package com.tdd;

import static org.junit.Assert.*;

import java.math.BigDecimal;

import org.junit.Before;
import org.junit.Test;

public class MinusTest {
	HpStack stack;
	Minus minus;

	@Before
	public void init() {
		stack = new HpStack();
		minus = new Minus();
	}

	@Test
	public void subtractTwoNumbers() {
		stack.push(new BigDecimal(4));
		stack.push(new BigDecimal(-7));
		minus.operate(stack);
		assertEquals(11, stack.peek());
	}

}
